Corpus of Electronic Texts Edition
The Gaelic Maundeville (Author: John Maundeville)
paragraph 139
If the diamond be (worn) on a man's left side, its virtue is greater than on the right, because it grows more constantly toward the north, the left side of the world, than towards
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the south. And whoso beareth a diamond on his left side it keepeth him strong and vigorous, and is a sound safeguard, and giveth him graces in deed and arbitrament against his enemies if his cause be rightful, and it keepeth him in good wit and parteth him from strife, and evil dreams and wicked spirits and from the hurt of every wild beast, and from enchantments, and from poison. And thus it is best (when obtained) without traffic, and without being gotten by begging, and thus its virtues are the greater, and it protects one more strongly against one's enemies, and it helpeth against the lightness of the intellect. Put it on the loadstone, and if the diamond be good it will not let it draw the needle, and the loadstone is the same as the magnet. And these virtues are not always therein through the fault of him who carries it.